Right fibrous trigone

The right fibrous trigone (trigonum fibrosum dextrum) in the heart is a strong, dense connective tissue structure located at the junction between the right fibrous ring (tricuspid annulus), the left fibrous ring (mitral annulus), and the aortic fibrous ring, thereby linking these key elements of the fibrous skeleton.

This trigone provides significant mechanical support to the cardiac base and serves as an important anchoring site for valve structures and myocardial fibers. It also has major functional importance in cardiac conduction, as it is closely associated with the atrioventricular bundle, contributing to the electrical insulation between atria and ventricles while allowing controlled impulse transmission.